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12-Rail Power Supply Sequencer and Monitor with ACPI Support

Inventory: 6,792
Custom reel may be available

Download data sheet for UCD90120A
  |   View additional information for UCD90120A

Packaging information

Package | Pins VQFN (RGC) | 64
Operating temperature range (℃) Q (-40 to 125)
Package qty | Carrier: 250 | SMALL T&R
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Quality information

RoHS Yes
Lead finish / Ball material NIPDAU
MSL rating / Peak reflow Level-3-260C-168 HR
Material content View
DPPM / MTBF / Fit rate View
Qualification summary View
Ongoing reliability monitoring View
Device marking View


  • Monitor and Sequence 12 Voltage Rails
    • All Rails SampledEvery 400 µs
    • 12-bit ADC With 2.5-V, 0.5% Internal VREF
    • Sequence Based on Time, Rail and Pin Dependencies
    • FourProgrammable Undervoltage and Overvoltage Thresholds perMonitor
  • Nonvolatile Error and Peak-Value Logging per Monitor (up to 12 Fault Detail Entries)
  • Closed-Loop Margining for 10 Rails
    • Margin Output Adjusts Rail Voltage to Match User-Defined MarginThresholds
  • Programmable Watchdog Timer and System Reset
  • Flexible Digital I/O Configuration
  • Pin-Selected Rail States
  • Multiphase PWM Clock Generator
    • Clock Frequencies From 15.259kHz to
      125 MHz
    • Capability to Configure Independent Clock Outputs forSynchronizing Switch-Mode Power Supplies
  • JTAG and I2C/SMBus/PMBus™ Interfaces

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The UCD90120A is a 12-rail PMBus/I2C addressable power-supplysequencer and monitor. The device integrates a 12-bit ADC for monitoring up to 12 power-supplyvoltage inputs. Twenty-six GPIO pins can be used for power supply enables, power-on reset signals,external interrupts, cascading, or other system functions. Twelve of these pins offer PWMfunctionality. Using these pins, the UCD90120A offers support for margining, and general-purposePWM functions.

Specific power states can be achieved using the Pin-Selected Rail States feature. Thisfeature allows with the use of up to 3 GPIs to enable and disable any rail. This is useful forimplementing system low-power modes and the Advanced Configuration and Power Interface (ACPI)specification that is used for hardware devices.

The TI Fusion Digital Power™ designer software isprovided for device configuration. This PC-based graphical user interface (GUI) offers an intuitiveinterface for configuring, storing, and monitoring all system operating parameters.

Qty Price
1-99 $8.32
100-249 $7.27
250-999 $5.60
1,000+ $5.01

Alternative carriers

Part number UCD90120ARGCR
Package qty | Carrier 2,000 | LARGE T&R
Custom reel may be available
Inventory 6,241
Qty | Price (USD) 1ku | $4.36